The Altecnic 28mm Chrome Plated Intaball Valve with a Blue Lever Handle is a type of isolating ball valve designed for plumbing and heating systems.

Here are its main features and functions:

• Size: 28mm, which refers to the diameter of the pipe it is meant to connect to.
• Material: Made of brass and then hard chrome-plated, giving it a corrosion-resistant finish.
• Type: Intaball valve, which is a type of ball valve, allows easy flow control through a quarter-turn mechanism.
• Lever Handle: The blue handle provides easy identification, typically for cold water or certain types of service, depending on the system.
• Locking Mechanism: Comes with a lock feature, which can be used to prevent unauthorized adjustment.

This valve is often used to isolate specific sections of plumbing, allowing maintenance without shutting off the entire system. It’s especially popular in heating and water systems due to its durability and corrosion resistance.